| Competition: | 19th America's Cup |
| Defender Country: | United States |
| Defender Burgee: | Burgee of the New York Yacht Club.svg |
| Defender Club: | New York Yacht Club |
| Defender Yacht: | Constellation |
| Challenger Country: | United Kingdom |
| Challenger Flag Variant: | civil |
| Challenger Burgee: | Burgee of royal thames yc.svg |
| Challenger Club: | Royal Thames Yacht Club |
| Challenger Yacht: | Sovereign |
| Location: | Newport, Rhode Island, United States |
| Dates: | September 1964 |
| Rule: | 12-metre |
| Winning Club: | New York Yacht Club |
| Score: | 4–0 |
| Next: | 1967 |
| Prev: | 1962 |
The 1964 America's Cup was held in September 1964 at Newport, Rhode Island. The US defender, Constellation, skippered by Bob Bavier, defeated the British challenger, Sovereign, skippered by Peter Scott, in a four-race sweep.
Constellation had beaten Columbia, Easterner and Nefertiti, and American Eagle to become the defender. Sovereign had beaten Kurrewa to become the challenger.